Lugging disc for strainer wire



NOV. 5, J. HESS LUGGING DISC FOR STRAINER WIRE Filed Aug. 6, 1949 3Sheets-Sheet 1 5 INVENTOR.

mm Mass.

, BY gem ATT RNEVS NOV. 5, 1957 -1555 2,811,882

- LUGGING DISC FOR STRAINER WIRE 3 Sheets-Sheet 2 F E 4 l0 Filed Aug. 6,1949 air.

.ILQ. v f E INVENT UAc E ATT NEYS Nov. 5, 1957 J. ss 2,811,882

' LUGGING DISC FOR STRAINER WIRE Filed Aug. 6, 1949 3 Sheets-Sheet 3INVENTOR. CI'AGK Hess BY mam ATTORN EYS United States Patent 6 LUGGINGDISC FOR STRAINER WIRE Jack Hess, Houston, Tex... assignor to HoustonWell Screen Company, Houston, Tex.

Application August 6, 1949, Serial No. 108,913 11 Claims. (Cl. 80-30)The invention relates to a device for forming lugs upon a wire of thetype used in wrapping a pipe or foundation member to create a wellscreen or strainer where lugs are formed on the wire in order todetermine the spacing of the wire wrapping and to create the gauge ofthe screen or strainer.

In the wrapping of wire about a foundation pipe in order to manufacturescreen or strainer for pipe the pipe is rotated to wrap the wire thereonand a substantial tension is applied to the wire so that it will bewrapped uniformly about the pipe. Lugs are formed on the side of thewire so that the wire will be spaced from the previous wrapping of wireand the size of the lugs determines the gauge or the spacing of thestrainer wire.

Heretofore the lugs have been formed on the wire by passing the wirebetween an anvil and a die where teeth were formed on the die as apermanent portion thereof. When the teeth became worn it becomenecessary to change to a new die.

With the present invention an arrangement and construction has beendevised wherein teeth are in the form of round pins which are reversibleend to end and may also be turned through a half turn so that as amatter of fact there are at least four surfaces available on each pinbefore the pin need be discarded on account of wear.

Another advantage of the present invention is the fact that the teethare in the form of rounded pins so as to form rounded or crescent shapedcross-section lugs on the wire which provide an exceptionally large andevenly distributed bearing surface on the next wrapping of wire. Therounded surfaces of the pins avoid any sharp breaks or any shearing ofthe wire but merely accomplish the formation thereof. This particularconstruction of wire having rounded lugs is of advantage because thereare no sharp corners at which shearing or breaking of wire may beinitiated.

It is one of the objects of the invention to provide a lugging disc forwell screen wire wherein the lugs are formedby rounded, replaceablepins.

A still further object of the invention is to provide a lugging devicewherein a pair of complementary discs provide a face of a size toreceive the wire to be lugged, and wherein rounded lugging pins engageone edge of the wire while it is thus confined in order to deform merelythe edge of the wire in forming the rounded lugs on the side of thewire.

Another object of the invention is to provide a lugging disc wherein thelugging pins are removably and adjustably retained within the luggingdiscs in order to form lugs on the wire.

Another object of the invention is to provide a backing disc so that thepins will be more or less loosely retained and subject to turning actiondue to engagement with the wire so that the pins will automatically moveto compensate for wear.

Other and further objects of the invention will be readily apparent whenthe following description is considered in connection with theaccompanying drawings wherein:

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Fig. 1 is a side view of a device embodying the invention, same beingpartly broken away to show a section taken on the line 1--1 of Fig. 2and looking in the direction of the arrows and illustrating the devicein use for the forming of the lugs on the wire and showing also thewrapping of the wire about the screen.

Fig. 2 is a plan view of the device shown in Fig. 1 with certain partsbroken away and illustrating the spacing of the wire on the pipe due tothe provision of the lugs.

Fig. 3 is an end elevation of the lugging discs and complementary discswith the wire shown as being deformed by the lugging pin. This sectionis taken on the line 33 of Fig. 4.

Fig. 4 is an edge elevation of the lugging disc illustrating the pinsand showing the anvil in dotted line.

Fig. 5 is a top view looking down on the wire to illustrate how the lugsare formed to project laterally from the wire.

Fig. 6 is a broken detailed view showing one form for retaining the pinin position so that it may be reversed end to end or may be rotated toprovide an unworn surface.

Fig. 7 is an enlarged detailed view of the contact between the pin andthe wire to form the lug which is taken on line 77 of Fig. 8.

Fig. 8 is an enlarged side elevation of the wire showing the formationof the lug with the forming pin shown in dotted line.

Figures 9 through 12 show a modified form of the device.

Fig. 9 is a flat elevation of the lugging disc illustrating the end viewof the pins which view is taken on the section 9-9 of Fig. 10.

Fig. 10 is an edge elevation of the modified form of lugging discswherein the pins are more or less loosely held but confined so that theymay turn automatically to compensate for wear.

Fig. 11 is an edge elevation of the lug supporting disc showing the pinsin section, this view having been taken on the line 1111 of Fig. 10.

Fig. 12 shows a view of the back of the discs which holds the pinsagainst movement and in a proper position to create a definite size lug.This section is taken on the line 1212 of Fig. 10.

Referring first to Figures 1 and 2, in the forming of screen or strainerpipe for wells a section of well pipe 2 is shown as having beenperforated at 3 with openings of a substantial size. In order to createthe strainer portion a wire 5 is shown as having been wrapped around thepipe. In order to space the successive wrappings of the wire each fromthe other the wire is formed with a plurality of lugs 6 spaced along thewire, usually at the time that the wire is being wrapped upon the pipe.

In Fig. 1 the wire 5 will be taken from a suitable spool or supply ofwire and will be passed between the discs 7 and 8 which may be said tobe complementary discs in that the discs overlap each other. Theshoulder or flange portion 9 is shown on the lugging disc 8 and at 10 onthe anvil discs 7.

The discs 7 and 8 are mounted upon the shafts 12 and 13 respectivelywhich are parallel and spaced apart with the disc being held upon theshaft by suitable keys 15.

Fig. 3 shows a side view looking at the wire 5 as the lugs 6 are beingformed on the edge thereof. The wire is shown as passing between thediscs 7 and 8 and also between the flanges 9 and 10. In this manner thewire is completely confined as best seen where the wire is shown insection in Fig. 4.

The lugging pins 26 are best seen in the enlarged view in Fig. 6 whereeach pin is in the form of a cylindrical member having a beveled endface 22 at either end.

In the form of the invention of Figs. 1 through 6 inclusive the luggingdisc 8 is shown as having a bore 23 therethrough which is threaded at 24to receive the adjusting set screw 25 which determines the position ofthe pin 20 with respect to the lugging disc. The set screw 26 holds thepin against rotation and by the adjusting of these set screws it seemsobvious that the pin may be adjusted, located or turned end for enddepending upon the position of the pin.

It will be observed that these pins are embedded for about one-half ofthe circumference of the pins in the bore 23 which extends into theflange portion 9 of the lugging disc.

In Fig. 6 the exposed portion 30 of the pin is that portion whichcreates the lug by moving in against the edge 31 of the wire so as todeform a portion of the edge in forming the lugs 6.

When the contacting portion 30 of the pin becomes worn then theloosening of the set screw 26 will permit turning of the pin to aboutone-half revolution so that an unworn surface will then be exposed tocontact the wire. On the other hand when all of these surfaces at oneend of the pin becomes worn then the pin may be removed and turned endfor end in order to present an unworn surface. It will be apparent fromthe foregoing that at least four wearing surfaces may be utilized uponeach pin. The pins can be made of a suitable material and heat treatedas desired so as to obtain the maximum of wear.

The anvil disc 7 serves to hold the wire against displacement when thepins engage the edge of the wire in forming the lugs. The anvil disc, aswill be apparent, overlaps what may be called a retaining disc 40 whichis on the shaft 13 and abuts against the inner edge of the lugging disc.This retainer disc or means is of a size to extend radially aboutone-half of the width or diameter of the pin as can be best seen at 42in Fig. 4. In this manner the pin is held against axial displacement andthe depth or size of the lugs will be thus determined.

In Fig. 6 the die, or lugging disc 8, is shown as having the flangeportion 9 made integral therewith as seen in the drawing, but it seemsobvious that this flange 9 may be made as a separate disc if desired.

A construction showing the lugging discs and the associated parts madeup in the form of separate plates or discs is illustrated in Figs. 9through 12 inclusive. Fig. is the most illustrative Where the actualdisc which carries the lugging pins is shown at 50 as having a pluralityof openings 51 therein with the pins 20 disposed in the openings andprojecting from one side of the disc 50.

The supporting flange portion 53 may be a portion of the disc 50 or itmay be a separate disc if desired. This portion 53 abuts the luggingdisc and has semicircular recesses therein to receive the inner half ofeach of the pins 20. This disc 53 is disposed upon the shaft 13 and ifit is a separate disc it abuts against the lugging disc 50.

A retainer disc 54 of the same diameter as the support disc 53 fitsagainst the disc 53 also on the shaft 13 but it does not have any of therecesses to receive the pins. The periphery thereof extends to about thecenter of the pins 20 and overlies the ends of the pins so as to holdthem against any longitudinal slight movement out of the lugging disc50.

A back-up disc 55 is also on the shaft 13 and is of the same diameter asthe lugging disc so as to cover the ends of the pins which are exposedat the back of the lugging discs.

With the foregoing arrangement it seems obvious that the pins are soenclosed that they cannot move longitudinally in either direction andthat they are capable of being turned about their own axis.

With this arrangement the pins can be turned so as to compensate forwear and it seems obvious too that as the wire moves along through thedie and anvil construction that it may cause the pins to rotate as thewire is leaving the pin. In this manner all the surfaces of one end ofthe pin will become worn more or less uniformly. Only occasionally willit be necessary to disassemble the several discs and reverse the pin endfor end. This may be done by loosening the back of disc 55 and slidingthe pins outwardly whereupon they may be reversed.

Broadly the invention contemplates an arrangement of a die and an anvildisc wherein extensive service is obtained from the lugging pins and thelugging discs so that many thousands of feet of wire may be lugged asdesired. The size and gauge of the lugs is dependent upon the size andshape of the pins 20 and it seems obvious that any desired size or shapemay be employed.

What is claimed is:

1. A lugging roll comprising a first cylindrical body having a pluralityof cylindrical holes therethrough with the axes of the holes parallel tothe roll axis and with the hole axes at equal radial distances from theroll axis and with the holes circumferentially spaced around the rollaxis, a second cylindrical body adjacent said first body and havingperipheral grooves therein of cylindrical surface with the groovesurfaces aligned with the surfaces of said holes, a cylindrical pindisposed in each of said holes and extending out into the adjacentgroove, and

leans preventing axial movement of said pins.

2. The combination of claim 1 in which said pins are rotatable in saidholes and grooves.

3. The combination of claim 2 with releasable means to prevent rotationof said pins in said holes and grooves.

4. The combination of claim 1 in which said means preventing axialmovement of said pins comprises a first means closing the ends of saidgrooves opposite from said holes sufliciently to prevent passage of thepins out said ends of the grooves and second means closing the ends ofsaid holes opposite from said grooves sufficiently to prevent passage ofthe pins out of said ends of the holes.

5. The combination of claim 4 in which said first means comprises athird cylindrical body adjacent said second body on the side thereofopposite from said first cylindrical body and having a diameter greaterthan the diameter between the inner edges of said grooves.

6. The combination of claim 5 in which said second means comprises afourth cylindrical body adjacent said first cylindrical body on the sidethereof opposite from said second cylindrical body and having a diametergreater than the diameter between the inner edges of said holes.

7. The combination of claim 5 in which said second means comprises afourth cylindrical body adjacent said first cylindrical body and havinga diameter greater than the diameter between the outer edges of saidholes and said pins are rotatable in said holes and grooves.

8. The combination of claim 5 in which said second means comprises ascrew thread in the end of each hole on the side of the first memberopposite said second member and a threaded pin screwed into the threadedend of each of said holes.

9. The combination of claim 8 in which said pins are rotatable in saidholes and grooves and there is a radial set screw in said first body inengagement with each pin to prevent rotation of the plug except when theset screw is released to allow adjustment of the position of the pin.

10. The combination of claim 1 in which each of said cylindrical pinshas a coaxial bevelled surface on the end thereof farthest from saidholes.

11. Apparatus for lugging wire comprising a pair of rotatably mountedcooperating anvil and die rolls shaped to define a channel between themthat is closed on the faces nearest the axes of the anvil and die rollsand one transverse side and is open along one transverse side, said dieroll having means including peripherally spaced dies thereon at the edgethereof nearest said open side to periodically reduce the distancebetween said faces of the channel along the edge thereof adjacent saidopen side as said rolls are turned, whereby wire fed through said rollshaving the same cross section as the full channel will be entirelysupported by the rolls except along said open side of the channel andwill be periodically compressed as said rolls are turned so as toextrude lugs on the wire along the edge thereof that moves adjacent theopen side of the channel, said die roll having a radially extendingflange at one edge, said flange being adjacent to but spaced from saidopen side of said channel, said flange having a plurality of holestherethrough with their lengths parallel to the axis of said die roll,the holes being spaced at equal radial distances from said die roll axisand circumferentially spaced around the die roll axis, said die rolladjacent said flange having peripheral grooves therein aligned with theholes in said flange, each of said dies comprising a pin disposed in oneof said holes and extending out into the adjacent groove, said groovesand pins extending only part way across said die r011 whereby the pinsare prevented from moving axially along said grooves out of said holes,and means preventing axial movement of said pins in the oppositedirection.

References Cited in the file of this patent UNITED STATES PATENTSSeymour June 26, Purdy May 26, Anderson Dec. 13, Getty Apr. 25, Moy eta1. Apr. 21, Getty July 7, Berkeley Nov. 30, Blecksmith Feb. 9, BrownAug. 31, Kerruish Apr. 2, Whann Sept. 20, Renfrew Feb. 7, Greulich Aug.10, Smith et a1 Mar. 31, Olivieri July 28,

FOREIGN PATENTS France May 23,

